// Copyright (C) Kumo inc. and its affiliates.
// Author: Jeff.li lijippy@163.com
// All rights reserved.
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published
// by the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.
//


#include <pollux/functions/prestosql/types/tdigest_registration.h>

#include <pollux/functions/prestosql/types/tdigest_type.h>
#include <pollux/type/type.h>

namespace kumo::pollux {
    namespace {
        class TDigestTypeFactories : public CustomTypeFactories {
        public:
            TypePtr getType(const std::vector<TypeParameter> &parameters) const override {
                POLLUX_CHECK_EQ(parameters.size(), 1);
                POLLUX_CHECK(parameters[0].kind == TypeParameterKind::kType);
                return TDIGEST(parameters[0].type);
            }

            // TDigest should be treated as Varbinary during type castings.
            exec::CastOperatorPtr getCastOperator() const override {
                return nullptr;
            }

            AbstractInputGeneratorPtr getInputGenerator(
                const InputGeneratorConfig & /*config*/) const override {
                return nullptr;
            }
        };
    } // namespace

    void registerTDigestType() {
        registerCustomType("tdigest", std::make_unique<const TDigestTypeFactories>());
    }
} // namespace kumo::pollux
